The Abu Dhabi National Oil Company (ADNOC) has awarded the Dubai-headquartered Metito a $54m contract to build a sewage treatment plant (STP) at the oil company’s Al-Ruwais housing complex.

The STP will treat up to 25,000 cubic metres a day (cm/d) of raw sewage, and will have a designed capacity of 30,000 cm/d to adapt to future expansions of the housing scheme. The treated sewage effluent (TSE) will be re-used for irrigation and landscaping within the housing complex.

The contract is the latest of several deals Metito has won in the emirate in recent months. In October, the firm was awarded a $5.7m contract to build a desalination project for the Zakum Development Company (Zadco) in Abu Dhabi.

Metito will provide emergency containerised water packages to Zirku Island, which will be used to produce potable water through seawater desalination. The project will utilise reverse osmosis (RO) and ultra-filtration (UF) advanced technology.

The work will also involve the required construction and interconnecting of pipelines. Metito will provide construction supervision services, as well as operation and maintenance (O&M) services for six months following the completion of the construction phase.

Zirku Island is located 140 kilometres northwest of Abu Dhabi and is the main industrial base for the processing, storage and export of oil from the Abu Dhabi National Oil Company’s (Adnoc’s) Upper Zakum, Umm Al-Dalkh and Satah oilfields.